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Report on a patient with paroxysmal cold hemoglobinuria
P R Subbarayan1, T Shichishima, H Yoshida
1Department of Veterinary Science, National Institute of Health, Tokyo, Japan.
International Journal of Hematology
|February 1, 1997
Summary
This study identifies anti-P alloantibodies causing paroxysmal cold hemoglobinuria (PCH). These antibodies target the P blood group antigen, leading to cold auto-agglutination and hemolysis, but are treatable.
Area of Science:
- Immunology
- Hematology
- Biochemistry
Background:
- Paroxysmal cold hemoglobinuria (PCH) is a rare autoimmune hemolytic anemia.
- Anti-P alloantibodies are a common cause of PCH, targeting the P blood group antigen system.
- Understanding the specificities of these antibodies is crucial for diagnosis and treatment.
Observation:
- Antibodies against the P antigen (anti-P alloantibodies) were observed to cause agglutination of P1 and P2 erythrocytes.
- This agglutination occurred with papain-treated erythrocytes at 4°C but not with PK or p erythrocytes.
- Serum from a patient with suspected PCH exhibited cold auto-agglutination properties.
Findings:
- The patient's serum showed anti-P specificity when tested against papain-treated O erythrocytes.
- Hemagglutination and immunohemolysis were inhibited by globoside (P antigen) and Forssman glycosphingolipid.
- This confirmed the diagnosis of PCH in the patient.
Implications:
- The findings confirm the role of anti-P alloantibodies in PCH.
- Inhibition assays with specific glycosphingolipids aid in diagnosing PCH.
- The patient achieved a complete cure within six months, suggesting effective treatment strategies for PCH.